Mold



2 Sheets-Sheet 1 I" HM I INVENTOR M ATTORNEY MOLD F. LOUISOT OriginalFiled June 9 19 25 Nov. 2 1926.

Nov. 2 1926.

F. LOUISOT MOLD 2 Sheets-Sheet 2 ori i Filed June 9 1925 Patented Nov.2, 1926.

UNITED, STATES PATENT OFFICE.

FELIX LQUISO'I', OI HASBBOUGK HEIGHTS, NEW JERSEY, ASSIGROR 'J.OvWILLIAM H. SHEFFIELD, 01'' NEW YORK, N. Y. 2

Mom).

Application filed June 9, 1925, Serial No. 85,848. Renewed February 2,1926.

The presentinvention is an improvement on the perforate molds heretoforeused in pulp molding machines and the like. Such molds have usually beenmade with perforate walls of wire mesh or other fabric which is more orless fragile. Such mold walls are fragile, leave an imprint of theirmesh on the molded surface and cannot well be used to produce verysharply angled outlines.

The objects of this invention are to provide a mold in which theforegoing objections and limitations will be overcome, which will berelatively simple, inexpensive and wholly practical for producing anydesired shapes.

The foregoing and other objects are attained in part byforming the moldas a laminate structure in which the. mold cavity is outlined by theedges of thin laminae spaced by interposed thin laminae set back .fromthe edges of the mold defining laminae so as to form minute drainagechannels in the face of the mold wall.

Various other novel features of the invention will appear as thespecification proceeds.

The drawings accompanying'and forming part of this specificationillustrate the invention as embodied in a practical commercial form butit should be understood that the structure may bemodified as regardsthis disclosure without departure from the broad spirit and scope of theinvention as hereinafter defined and claimed.

Figure 1 is a vertical sectional view of the mold, in the suctionchamber, closed ready to receive a charge of the pulp or other material. v

Figure 2 is a horizontal cross sectional view as on substantially theplane of line 22 of Figure 1, showing'the two parts of the moldseparated for the discharge of the molded article.

Figure 3 is a horizontal sectional view of one of the separable moldelements on an enlarged scale.

Figure 4 is a vertical central sectional view of the same.

In the illustration the mold receiving suction chamber of a moldingmachine is indicated at 5 having a bottom openin 6 through which themolded product is wltbdrawn, said opening being closed by a plug 7,carrying a support 8 for the molded article wit a pulp supply passage 9opening up through such support. This pulp passage opens out through theside of the plug so as to be 1 n communication with the pulp supplycondult 10 when the plug is in its closed position. Suction is appliedto the mold contaming chamber by suction conduit 11 and the drainage iscarried oil by a conduit 12.

The mold is shown as made up in two parts 13, 14 separable on a verticalcenter 4 line 15 and actuated by rods 16 entered through stufling boxesin the sides of the mold chamber and engaged by the arms 17 sliding onguides 18 and operated by screws 19. The shaft 20 which carries thesescrews is shown as provided with a pinion 21 engaged by an operatinggear 22.

The laminate structure of the mold is indicated in a general way inFigure 1 and is shown in detail in Figures 3 and 4. In the latter twoviews, the thickness of the laminae is exaggerated for purposes ofillustration but the thickness may be variable, depending on the size,quality and configuration of the work. Certain of the laminae, thealternate ones 23 in the illustration, have their inner edges 24.- cutor positioned to collectively define and outline the side walls of i themold cavity and the intermediate or intervening laminae 25 have theirinner edges 26 recessed or set back to outline circumferential drainagechannels 27 in the face of the thus formed mold wall. The intervening,spacing or channel forming laminae 25 are shown also as havingtheir-edges 28 adjacent the meeting faces of the mold members as setback from such faces to provide the passages 29 opening from thecircumferential channels 27 into the interior of the the mold blocks toguide them into proper cooperative relation. Thelaminae of which theblocks are composed are suitably secured together as by means ofsuitable through bolts 32 which may be simple headed over at theiropposite ends in the nature of long rivets.

The edges of the. mold wall defining laminae form narrow continuouscircumferential ribs collectively defining the shape of the mold cavityand they are spaced so closely together as to produce a substantiallysmooth continuous molded surface, as distinguished from the broken orlined surface produced by a wire mesh mold. The drainage channelsbetween the mold outlining laminaeare so minute as to afford nosubstantial breaks in the continuity of the mold face but because oftheir depth, their continuous extent and easy access at both sides ofthe separable molds, are fully capable of carrying off all the extractedliquid. The spacing laminae brace the mold defining laminae forming withthem practically a solid mass which is fully self-sustaining and can behandled without the exercise of any special care.

Because of the wide distribution of the drainage channels in the face ofthe mold and the full and free access of suction thereto, the moldcavity can be quickly and uniformly filled with the pulp or othermaterial by a single suction application and this constructionfurthermore enables the material to be the more firmly compacted anddried against the mold wall. Also, because of the relative continuity ofthe mold Wall, a higher degree of suction may be employed, resulting infaster operation and more uniform product.

What is claimed is:

1. A mold of laminate structure having a mold wall defined by the edgesof alternate laminations and with the edges of intervening laminae setback from the outline of such mold wall to provide drainage channels inthe face of the mold wall.

2. A mold consisting of horizontally disposed thin laminations with theedges of alternate laminae positioned to define a mold wall and theedges of the intervening laminae set back from the outline of the moldWall thus defined to provide drainage channels at the surface of themold wall.

3. A mold consisting of superposed thin laminations arranged inrelatively separable blocks with the opposing edges of certain laminaein the blocks defining mold walls and intervening laminae set back fromthe outline of such mold walls to form drainage channels at the faces ofsuch walls.

4. A mold consisting of superposed thin laminations with the edges ofcertain of the laminae positioned to define a mold wall of desiredoutline and separated by intervening laminae set back from such outlineto form drainage channels in the face of such mold wall.

5. A mold consisting of superposed thin laminations with the edges ofcertain of the laminae positioned to define a mold wall of desiredoutline and separated by intervening laminae set back from such outlineto form drainage channels in the face of such mold wall and a suctionchamber enclosing the laminate structure and into which the drainagechannels open.

6. A mold consisting of superposed thin laminations arranged inrelatively separable blocks with the opposing edges of certain laminaein the blocks defining mold lls and intervening laminae set back fromthe outline of such mold walls to form drainage channels at the faces ofsuch walls and a suction chamber enclosing the separable laminate blocksand in communication with the drainage channels in the faces of the moldwalls.

7. A mold consisting of superposed thin laminations arranged inrelatively separable blocks with the opposing edges of certain laminaein the blocks defining mold walls and intervening laminae set back fromthe outline of such mold walls to form drainage channels at the faces ofsuch walls and a suction chamber enclosing the separable laminate blocksand in communication with the drainage channels inthe faces of the moldwalls, the edges of the inset laminae being set back at the meetingfaces of the blocks to provide communication between the interior of thechamber and the drainage channels aforesaid.

8. A mold having a mold chamber defined by continuous narrow ribsarranged in spaced order with intervening continuous narrow channels.

9. A mold consisting of superposed thin laminations of alternatelylarger and smaller dimensions and with the edges of the larger laminaedefining a mold wall and the edges of the smaller intervening laminaedefining drainage channels at the surface of such mold wall.

10. A mold comprising relatively separable blocks of superposed thinlaminae with the opposed edges of such laminae shaped to form a ribbedmold chamber with intervening drainage channels between the ribs.

11. A mold comprising relatively separable blocks of superposed thinlaminae with the opposed edges of such laminae shaped to form a ribbedmold chamber with intervening drainage channels between the ribs, saiddrainage channels opening out through the meeting faces of the blocksand a chamber enclosing the laminate molds and in communication withsuch open channels.

12. A mold of the character disclosed, comprising superposed thinhorizontally disposed laminations having edges positioned collectivelyto define the side walls of a mold chamber with drainage channels in theface of the same.

13. A mold of the character disclosed, comprising superposed thinhorizontally disposed laminations having edges positioned collectivelyto define the side walls of a mold chamber with drainage channels in theface of the same, said laminae being secured to- 10 gether in blocksseparable on substantially vertical lines and with the drainage channelsextending out to the edges of such blocks.

In testimony whereof I aflix my signature.

FELIX LOUISOT.

